Dave Grohl would be an amazing mentor! I think a lot of Foo Fighters songs could be used for the AI stage (''Everlong,'' ''Walking After You,'' ''My Hero,'' etc.), and if Courtney Love would give the rights to Nirvana songs, they could use those as well. Hell, even if they did a general rock theme, I'd agree with it simply to see Dave interact with the contestants. He'd probably give them a wealth of knowledge. —Ashlyn